/*
 * Copyright (c) 2021. Dylan Cai
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

@file:Suppress("unused")

package com.price.common.extend

inline fun <T> List<T>.percentage(predicate: (T) -> Boolean) =
    filter(predicate).size.toFloat() / size


inline fun <T> List<T>.getIndex(index: Int): T? {
    return if (index >= size) {
        null
    } else {
        get(index)
    }
}
inline fun <T> List<T>.sub(start: Int,end:Int): List<T>? {
    return if (start>=end || start>=size || end>=size) {
        this
    } else {
        subList(start,end)
    }
}